Accounting policies - Disaggregated revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Total Revenue	$ 25,051,705	$ 16,413,146	$ 65,676,737	$ 50,217,987
Minimum [Member]
Contracts in progress
Number of days after consumption billings are collected			30 days
Maximum [Member]
Contracts in progress
Number of days after consumption billings are collected			45 days
Retail revenue [Member]
Total Revenue	6,274,650	5,247,042	$ 19,114,653	16,633,137
Bulk revenue [Member]
Total Revenue	8,667,931	6,868,134	24,442,324	19,826,075
Services revenue [Member]
Total Revenue	8,731,124	3,210,584	18,530,427	10,514,669
Manufacturing revenue [Member]
Total Revenue	$ 1,378,000	$ 1,087,386	$ 3,589,333	$ 3,244,106